Clark sees traffic congestion as one of the most serious problems of our time - for a variety of reasons.

VOA: standard.2010.07.26

For most problems on exams, those quantities are constant, independent of temperature.

然后对于考试中的大部分问题，这些量都是与温度无关的常数。

麻省理工公开课 - 热力学与动力学课程节选

It's probably among the most useful ideas there is for solving complicated problems.

这大概是解决复杂问题,最有用的思想之一。

麻省理工公开课 - 计算机科学及编程导论课程节选